#18DECA
Closest named color: Turquoise (#40E0D0). oklch(81% 0.141 183.3), rgb(24, 222, 202).
Aa
Black text reads best on this color (12.34:1).
About this color
#18DECA is a light, vivid teal or cyan. In OKLCH its lightness is 81%, its chroma 0.141 and its hue 183°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise (#40E0D0), ΔE 0.017 away. Black text reads best on it, at 12.34:1.
| Hue family | Teals and cyans |
| Lightness | light (81%) |
| Chroma | vivid (0.141) |
| Temperature | cool |
| Nearest name | Turquoise (#40E0D0) |
| Black text | 12.34:1 |
| White text | 1.70:1 |
Values
| HEX | #18DECA |
| RGB | rgb(24, 222, 202) |
| HSL | hsl(174, 80%, 48%) |
| OKLCH | oklch(81% 0.141 183.3) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #18DECA | 1.70:1 | Fails | Lc -33.6 | Non-text elements, placeholder text |
| Black text on #18DECA | 12.34:1 | AAA | Lc 74.0 | Content text, not long reading |
| #18DECA text on white | 1.70:1 | Fails | Lc 29.8 | Dividers and decoration only |
| #18DECA text on black | 12.34:1 | AAA | Lc -73.0 | Content text, not long reading |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 300.
-
Step 50
50
#E8FAF7
oklch(97.1% 0.019 184.9)
-
Step 100
100
#CDF3EC
oklch(93.5% 0.04 183.1)
-
Step 200
200
#9DEBDE
oklch(88.6% 0.079 182.9)
-
Step 300
300 (this color)
#18DECA
oklch(81% 0.141 183.3)
-
Step 400
400
#00B9A8
oklch(70.6% 0.125 183.4)
-
Step 500
500
#009F90
oklch(63.1% 0.112 183.2)
-
Step 600
600
#008679
oklch(55.7% 0.099 183.1)
-
Step 700
700
#007066
oklch(49% 0.087 184.2)
-
Step 800
800
#005C53
oklch(42.6% 0.076 183.4)
-
Step 900
900
#004D45
oklch(37.7% 0.067 183.1)
-
Step 950
950
#002E29
oklch(27.1% 0.048 183.6)
#18DECA with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #D3D0C9 | 0.151 |
| Deuteranopia (no green cones) | #BBBFCC | 0.142 |
| Tritanopia (no blue cones) | #00E3D8 | 0.020 |
| Achromatopsia (no color) | #C6C6C6 | 0.142 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18DECA
#18DECA
oklch(81% 0.141 183.3)
- #FFA1B9
#FFA1B9
oklch(81% 0.115 3.4)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #18DECA, closest first.
No curated palette has a color within ΔE 0.04 of #18DECA.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise #40E0D0 ΔE 0.017
- Medium Turquoise #48D1CC ΔE 0.039
- Aqua Marine #2EE8BB ΔE 0.041
- Dark Turquoise #00CED1 ΔE 0.051
- Aqua Blue #02D8E9 ΔE 0.053
- Seafoam Blue #78D1B6 ΔE 0.053
- Medium Aquamarine #66CDAA ΔE 0.056
- Emerald #06D6A0 ΔE 0.058
Use #18DECA in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.